Method of making oil caps.



J. L. OSGOOD.

METHOD OF MAKING OIL GAPS.

APPLICATION FILED AUG. 7, 1913.

1,120,,5Q5 I Patented Dec. 8, 1914.

To all whom it ma concern:

' JOHN L. OSGOOD, 0F BUFFALO, NEW YORK.

METHOD OF MAKING OIL-CAPS.

\ Specification of Letters Patent.

Patented Dec. 8, 1914.

Application filed August 7, 1913. Serial No. 783,544.

Be it known t at I, JOHN L. Osoooo, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Methods of Making Oil- Caps,'of which the following is a specification.

This invention relates to the manufacture of oil caps, or valved closures for oiling ducts, of that type which have an *oil en-- trance orifice normally closed by a spring seated ball or valve that is adapted to be pushed inwardl by thespout of the oil can to open the ori ce when introducing the oil.

The objects of the invention are to produce, by a simple, expeditiousand inexpensive method, a practical and desirable 'oil cap of this kind which is of exceedingly simple construction. In the accompanying drawings: Figure 1 is an elevation of an oil cap'made in accord- ,ance with the invention. Fig. 2 is a cross section thereof. Figs. 3, 4, 5 and 6 are enlarged sectional elevations illustrating successive steps in the method of manufacturing the caps.

A, Figs. 1, 2 and'6 represents the oil cap, which, as usual, comprises a hollow or tubular bod provided at one end with an oil inlet ori ce a which is normally closed by a ball or valve 1) that is located in the cap and is yieldingly held to its seat 6 by a spring 0, also located in the cap body. 'lhe cap has the usual screwthreaded shank d for securing it in place in communication with the oil duct leadin to the part to be lubricated.

The body 0 the cap with the exception of the threaded shank is refer'ably of ol gonal cross-sectional s ape externa 1y, thus adapting it to be turned with a wrench for securing it in place and detaching it. This sha e, furthermore, enables the cap to be readi y made from polygonal stock as hereinafter explained.

6 represents an inwardly projectin spring seat at the shank end of the cap, w ich retains the valve spring in place and affords a bearing for the adjacent end thereof. This seat is-formed by an integral end lip or flange of the body which is spun or turned inwardly after the 'ball valve and spring have been placed in the cap.

The body of the ca inc uding the spring seat e and the seat 6 around the oil orifice for the ball valve consists of a single integral piece, thus making an exceedingly simple cap and enabling the same to be manu factured at a very small expense, as will appear from the following description: lhe cap bodies are produced in a turning lathe from long polygonal stock or bars F, Figs. 3-6, which correspond in cross-sectional shape and dimensions with the polygonal portion of the cap body. The stock F is fed endwise through the lathe chuck and is operated upon by suitable tools presented in succession to the work, as is done in turning articles from continuous stock in a lathe. In-the first operation a suitable compound tool drills a spring chamber 9 with a conical inner end and reduces the end portion of the stock forming a cylindrical part hfor the threaded shank and an end flange z, leaving the stock as shown in Fig. 3. The second operation consists in placin the ball or valve 6 and the spring 0 in the spring chamber or cavity 9 and turning inwardly the flange 2' by a spinning tool to form the spring seat 6 as indicated in Fig. 4. In the t ird operation a threading tool cuts the screwthread on the shank d, leavin the stock as shown in-Fig. 5. A cutting-o tool is then used to sever the cap from the stock by a transverse cut intersecting the conical inner end of the spring cavity, as indicated in Fig. 6, thus forming the oil inlet opening a and completing the cap. Since the cap is out ed in a plane between the extremities of the conical inner end of the spring chamber,

a flange is left that forms the seat 6 for the ball or valve. In cutting off the cap the stood that the tools for the successive op-' erations can be mounted on a turret and suitable gages employed to enable the operations to be performed in quick succession with the minimum amount of labor. The thread could, of course, be out on the shank before spinning in the spring seat e, but the seat is preferably spun before cutting the thread so as to avoid'possible mutilation of the thread. It may also be possible to .form the threaded shank and the integral inturned spring seat 6 and insert the spring and ball in adifi'erent order and by di erent' tools in a greater or less number of operalot end of a bar, inserting the valve in said chamber, turning inwardly the extremity of the bar to form a retaining part, and severing the chambered portion of the bar from the bar in a reduced inner end 0 forming the oil inlet opening, substantially as set forth. 1

a 2. The herein described method plane intersecting said of making oil caps having a valve-closed oil inlet orifice at one end, consisting in drilling a chamber with a conical innerend in the end 0f.a bar, inserting the valveand a seating spring therefor in said chamber, forming an inwardly extending seat for the spring by an integral end portion ofthe bar, and severing the chambered portion of the bar from the bar in a plane lntersecting said conical inner end of said chamber, thereb forming the oil inlet forth.

3. The herein described method of making oil caps having a valve-closed oil inlet orifice at one end, consisting in drilling a' opening, substantia y as set chamber with a conical inner end inthe end of a bar, inserting thevalve and a seating spring therefor in, said chamber, spinning inwardly the extremity of the barto form f the chamber, thereby bered portion of the bar from the bar in a plane intersecting said conical inner end of said chamber, thereby forming the oil inlet opening, substantially as set forth.

4. The herein described method of making oil caps having a valve-closedoil inlet orifice at one end, consisting in drilling a chamber with a conlcal inner end inthe end of a bar of polygonal cross sectlon, 11186117 ing the valve and a seating spring therefor in said chamber, forming a screwthreaded shank and an inturned integral seat for the spring'at the end of the bar, and severing the chambered portion of thebar from the bar in a plane intersecting said conical inner end 'of said chamber, thereby forming the oil inlet opening, substantially as set forth.

5. The-herein described method of makorifice at one end, consisting in first drilling a chamber with a conical inner end in the end of the bar of polygonal cross-section and reducing. the end portion of the bar to cylindrical form with an 'end flange, then inserting the valve and a seating spring therefor in said chamber, then spinning said 'endflange inwardly to form a seat for the spring, then screwthreading the cylindrical portion. of the bar, and then severing the ortion of the bar from the bar chambered in a 'lane intersecting said conical inner end o said chamber, thereby forming the oil inlet-opening, substantially as set forth.

Witness my hand this 4 day of August, 1913. I g

" JOHN L. OSGOOD.

Witnesses:

JOHEN DEMPSEY, v ,An'rnnn MUELIER.

"a seat for the spring, and severing the ohaming oil caps having a valve-closed oil inlet 

